Lateral roots are produced exogenously from pericycle.

Answer

### Step-by-Step Solution:

1. **Understanding the Structure of Roots**:
- In dicot plants, roots and stems have distinct layers. The outermost layer is the epidermis, followed by the endodermis, which is composed of cholenchyma cells.

2. **Identifying the Pericycle**:
- Beneath the endodermis, there is a layer formed by parenchyma and sclerenchyma cells. This layer is known as the pericycle.

3. **Role of the Pericycle**:
- The pericycle is crucial in the formation of lateral roots. It is the layer from which lateral roots originate.

4. **Exogenous Origin of Lateral Roots**:
- Lateral roots arise exogenously, meaning they develop from the outer layers of the root, specifically from the pericycle.

5. **Connection to Vascular Tissues**:
- The pericycle encircles the vascular tissues, which include xylem and phloem, providing structural support and facilitating the growth of lateral roots.

6. **Conclusion**:
- Thus, lateral roots are produced exogenously from the pericycle in dicot roots.